The fuse, in the upper branch of the circuit shown, is an ideal $$4.0\ \text{A}$$ fuse. The fuse has zero resistance as long as current through it remains less than $$4.0\ \text{A}$$. The fuse blows out when the current reaches $$4.0\ \text{A}$$ Needless to say that the resistance becomes infinite thereafter. Switch $$S$$ is closed at time $$t=0$$. The fuse blows out at time

A

$$t=2\ \text{s}$$

B

$$t=4\ \text{s}$$

C

$$t=8\ \text{s}$$

D

It won't blow